If I were newbie, I would go with Ubuntu 14.04 with Unity. Why?
1. Extremely stable,
2. Just works out-of-the-box; don't have to worry about kernel not recognising devices and that kind of staff, it just works,
3. Extremely user-friendly,
4. Comes fully-featured; just install Ubuntu and everything is there (Browser, Mail, LibreOffice, even video recorder),
5. Intuitive UI,
6. Rich Software-Center,
and more. Just give it a try Its worth it